2 * MJPEG encoder and decoder
3 * Copyright (c) 2000, 2001 Fabrice Bellard.
4 * Copyright (c) 2003 Alex Beregszaszi
5 * Copyright (c) 2003-2004 Michael Niedermayer
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 * Support for external huffman table, various fixes (AVID workaround),
22 * aspecting, new decode_frame mechanism and apple mjpeg-b support
23 * by Alex Beregszaszi <alex@naxine.org>
28 * MJPEG encoder and decoder.
36 #include "mpegvideo.h"
38 /* use two quantizer tables (one for luminance and one for chrominance) */
42 typedef struct MJpegContext {
43 uint8_t huff_size_dc_luminance[12]; //FIXME use array [3] instead of lumi / chrom, for easier addressing
44 uint16_t huff_code_dc_luminance[12];
45 uint8_t huff_size_dc_chrominance[12];
46 uint16_t huff_code_dc_chrominance[12];
48 uint8_t huff_size_ac_luminance[256];
49 uint16_t huff_code_ac_luminance[256];
50 uint8_t huff_size_ac_chrominance[256];
51 uint16_t huff_code_ac_chrominance[256];
54 /* JPEG marker codes */
57 SOF0 = 0xc0, /* baseline */
58 SOF1 = 0xc1, /* extended sequential, huffman */
59 SOF2 = 0xc2, /* progressive, huffman */
60 SOF3 = 0xc3, /* lossless, huffman */
62 SOF5 = 0xc5, /* differential sequential, huffman */
63 SOF6 = 0xc6, /* differential progressive, huffman */
64 SOF7 = 0xc7, /* differential lossless, huffman */
65 JPG = 0xc8, /* reserved for JPEG extension */
66 SOF9 = 0xc9, /* extended sequential, arithmetic */
67 SOF10 = 0xca, /* progressive, arithmetic */
68 SOF11 = 0xcb, /* lossless, arithmetic */
70 SOF13 = 0xcd, /* differential sequential, arithmetic */
71 SOF14 = 0xce, /* differential progressive, arithmetic */
72 SOF15 = 0xcf, /* differential lossless, arithmetic */
74 DHT = 0xc4, /* define huffman tables */
76 DAC = 0xcc, /* define arithmetic-coding conditioning */
78 /* restart with modulo 8 count "m" */
88 SOI = 0xd8, /* start of image */
89 EOI = 0xd9, /* end of image */
90 SOS = 0xda, /* start of scan */
91 DQT = 0xdb, /* define quantization tables */
92 DNL = 0xdc, /* define number of lines */
93 DRI = 0xdd, /* define restart interval */
94 DHP = 0xde, /* define hierarchical progression */
95 EXP = 0xdf, /* expand reference components */
121 SOF48 = 0xf7, ///< JPEG-LS
122 LSE = 0xf8, ///< JPEG-LS extension parameters
129 COM = 0xfe, /* comment */
131 TEM = 0x01, /* temporary private use for arithmetic coding */
133 /* 0x02 -> 0xbf reserved */
137 /* These are the sample quantization tables given in JPEG spec section K.1.
138 * The spec says that the values given produce "good" quality, and
139 * when divided by 2, "very good" quality.
141 static const unsigned char std_luminance_quant_tbl[64] = {
142 16, 11, 10, 16, 24, 40, 51, 61,
143 12, 12, 14, 19, 26, 58, 60, 55,
144 14, 13, 16, 24, 40, 57, 69, 56,
145 14, 17, 22, 29, 51, 87, 80, 62,
146 18, 22, 37, 56, 68, 109, 103, 77,
147 24, 35, 55, 64, 81, 104, 113, 92,
148 49, 64, 78, 87, 103, 121, 120, 101,
149 72, 92, 95, 98, 112, 100, 103, 99
151 static const unsigned char std_chrominance_quant_tbl[64] = {
152 17, 18, 24, 47, 99, 99, 99, 99,
153 18, 21, 26, 66, 99, 99, 99, 99,
154 24, 26, 56, 99, 99, 99, 99, 99,
155 47, 66, 99, 99, 99, 99, 99, 99,
156 99, 99, 99, 99, 99, 99, 99, 99,
157 99, 99, 99, 99, 99, 99, 99, 99,
158 99, 99, 99, 99, 99, 99, 99, 99,
159 99, 99, 99, 99, 99, 99, 99, 99
163 /* Set up the standard Huffman tables (cf. JPEG standard section K.3) */
164 /* IMPORTANT: these are only valid for 8-bit data precision! */
165 static const uint8_t bits_dc_luminance[17] =
166 { /* 0-base */ 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0 };
167 static const uint8_t val_dc_luminance[] =
168 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
170 static const uint8_t bits_dc_chrominance[17] =
171 { /* 0-base */ 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 };
172 static const uint8_t val_dc_chrominance[] =
173 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
175 static const uint8_t bits_ac_luminance[17] =
176 { /* 0-base */ 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d };
177 static const uint8_t val_ac_luminance[] =
178 { 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
179 0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
180 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
181 0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
182 0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
183 0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
184 0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
185 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
186 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
187 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
188 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
189 0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
190 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
191 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
192 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
193 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
194 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
195 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
196 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
197 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
201 static const uint8_t bits_ac_chrominance[17] =
202 { /* 0-base */ 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77 };
204 static const uint8_t val_ac_chrominance[] =
205 { 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
206 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
207 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
208 0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
209 0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
210 0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
211 0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
212 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
213 0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
214 0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
215 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
216 0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
217 0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
218 0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
219 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
220 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
221 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
222 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
223 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
224 0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
228 /* isn't this function nicer than the one in the libjpeg ? */
229 static void build_huffman_codes(uint8_t *huff_size, uint16_t *huff_code,
230 const uint8_t *bits_table, const uint8_t *val_table)
232 int i, j, k,nb, code, sym;
239 sym = val_table[k++];
241 huff_code[sym] = code;
248 #ifdef CONFIG_ENCODERS
249 int mjpeg_init(MpegEncContext *s)
253 m = av_malloc(sizeof(MJpegContext));
260 /* build all the huffman tables */
261 build_huffman_codes(m->huff_size_dc_luminance,
262 m->huff_code_dc_luminance,
265 build_huffman_codes(m->huff_size_dc_chrominance,
266 m->huff_code_dc_chrominance,
269 build_huffman_codes(m->huff_size_ac_luminance,
270 m->huff_code_ac_luminance,
273 build_huffman_codes(m->huff_size_ac_chrominance,
274 m->huff_code_ac_chrominance,
282 void mjpeg_close(MpegEncContext *s)
284 av_free(s->mjpeg_ctx);
286 #endif //CONFIG_ENCODERS
288 #define PREDICT(ret, topleft, top, left, predictor)\
290 case 1: ret= left; break;\
291 case 2: ret= top; break;\
292 case 3: ret= topleft; break;\
293 case 4: ret= left + top - topleft; break;\
294 case 5: ret= left + ((top - topleft)>>1); break;\
295 case 6: ret= top + ((left - topleft)>>1); break;\
297 case 7: ret= (left + top)>>1; break;\
300 #ifdef CONFIG_ENCODERS
301 static inline void put_marker(PutBitContext *p, int code)
303 put_bits(p, 8, 0xff);
304 put_bits(p, 8, code);
307 /* table_class: 0 = DC coef, 1 = AC coefs */
308 static int put_huffman_table(MpegEncContext *s, int table_class, int table_id,
309 const uint8_t *bits_table, const uint8_t *value_table)
311 PutBitContext *p = &s->pb;
314 put_bits(p, 4, table_class);
315 put_bits(p, 4, table_id);
320 put_bits(p, 8, bits_table[i]);
324 put_bits(p, 8, value_table[i]);
329 static void jpeg_table_header(MpegEncContext *s)
331 PutBitContext *p = &s->pb;
338 put_bits(p, 16, 2 + 2 * (1 + 64));
340 put_bits(p, 16, 2 + 1 * (1 + 64));
342 put_bits(p, 4, 0); /* 8 bit precision */
343 put_bits(p, 4, 0); /* table 0 */
345 j = s->intra_scantable.permutated[i];
346 put_bits(p, 8, s->intra_matrix[j]);
349 put_bits(p, 4, 0); /* 8 bit precision */
350 put_bits(p, 4, 1); /* table 1 */
352 j = s->intra_scantable.permutated[i];
353 put_bits(p, 8, s->chroma_intra_matrix[j]);
361 put_bits(p, 16, 0); /* patched later */
363 size += put_huffman_table(s, 0, 0, bits_dc_luminance, val_dc_luminance);
364 size += put_huffman_table(s, 0, 1, bits_dc_chrominance, val_dc_chrominance);
366 size += put_huffman_table(s, 1, 0, bits_ac_luminance, val_ac_luminance);
367 size += put_huffman_table(s, 1, 1, bits_ac_chrominance, val_ac_chrominance);
372 static void jpeg_put_comments(MpegEncContext *s)
374 PutBitContext *p = &s->pb;
378 if (s->aspect_ratio_info /* && !lossless */)
383 ff_put_string(p, "JFIF", 1); /* this puts the trailing zero-byte too */
384 put_bits(p, 16, 0x0201); /* v 1.02 */
385 put_bits(p, 8, 0); /* units type: 0 - aspect ratio */
386 put_bits(p, 16, s->avctx->sample_aspect_ratio.num);
387 put_bits(p, 16, s->avctx->sample_aspect_ratio.den);
388 put_bits(p, 8, 0); /* thumbnail width */
389 put_bits(p, 8, 0); /* thumbnail height */
393 if(!(s->flags & CODEC_FLAG_BITEXACT)){
397 put_bits(p, 16, 0); /* patched later */
398 ff_put_string(p, LIBAVCODEC_IDENT, 1);
399 size = strlen(LIBAVCODEC_IDENT)+3;
404 if( s->avctx->pix_fmt == PIX_FMT_YUV420P
405 ||s->avctx->pix_fmt == PIX_FMT_YUV422P
406 ||s->avctx->pix_fmt == PIX_FMT_YUV444P){
410 put_bits(p, 16, 0); /* patched later */
411 ff_put_string(p, "CS=ITU601", 1);
412 size = strlen("CS=ITU601")+3;
418 void mjpeg_picture_header(MpegEncContext *s)
420 const int lossless= s->avctx->codec_id != CODEC_ID_MJPEG;
421 const int ls = s->avctx->codec_id == CODEC_ID_JPEGLS;
423 assert(!(ls && s->mjpeg_write_tables));
425 put_marker(&s->pb, SOI);
427 if (!s->mjpeg_data_only_frames)
429 jpeg_put_comments(s);
431 if (s->mjpeg_write_tables) jpeg_table_header(s);
433 switch(s->avctx->codec_id){
434 case CODEC_ID_MJPEG: put_marker(&s->pb, SOF0 ); break;
435 case CODEC_ID_LJPEG: put_marker(&s->pb, SOF3 ); break;
436 case CODEC_ID_JPEGLS: put_marker(&s->pb, SOF48); break;
440 put_bits(&s->pb, 16, 17);
441 if(lossless && s->avctx->pix_fmt == PIX_FMT_RGBA32)
442 put_bits(&s->pb, 8, 9); /* 9 bits/component RCT */
444 put_bits(&s->pb, 8, 8); /* 8 bits/component */
445 put_bits(&s->pb, 16, s->height);
446 put_bits(&s->pb, 16, s->width);
447 put_bits(&s->pb, 8, 3); /* 3 components */
450 put_bits(&s->pb, 8, 1); /* component number */
451 put_bits(&s->pb, 4, s->mjpeg_hsample[0]); /* H factor */
452 put_bits(&s->pb, 4, s->mjpeg_vsample[0]); /* V factor */
453 put_bits(&s->pb, 8, 0); /* select matrix */
456 put_bits(&s->pb, 8, 2); /* component number */
457 put_bits(&s->pb, 4, s->mjpeg_hsample[1]); /* H factor */
458 put_bits(&s->pb, 4, s->mjpeg_vsample[1]); /* V factor */
460 put_bits(&s->pb, 8, lossless ? 0 : 1); /* select matrix */
462 put_bits(&s->pb, 8, 0); /* select matrix */
466 put_bits(&s->pb, 8, 3); /* component number */
467 put_bits(&s->pb, 4, s->mjpeg_hsample[2]); /* H factor */
468 put_bits(&s->pb, 4, s->mjpeg_vsample[2]); /* V factor */
470 put_bits(&s->pb, 8, lossless ? 0 : 1); /* select matrix */
472 put_bits(&s->pb, 8, 0); /* select matrix */
477 put_marker(&s->pb, SOS);
478 put_bits(&s->pb, 16, 12); /* length */
479 put_bits(&s->pb, 8, 3); /* 3 components */
482 put_bits(&s->pb, 8, 1); /* index */
483 put_bits(&s->pb, 4, 0); /* DC huffman table index */
484 put_bits(&s->pb, 4, 0); /* AC huffman table index */
487 put_bits(&s->pb, 8, 2); /* index */
488 put_bits(&s->pb, 4, 1); /* DC huffman table index */
489 put_bits(&s->pb, 4, lossless ? 0 : 1); /* AC huffman table index */
492 put_bits(&s->pb, 8, 3); /* index */
493 put_bits(&s->pb, 4, 1); /* DC huffman table index */
494 put_bits(&s->pb, 4, lossless ? 0 : 1); /* AC huffman table index */
496 put_bits(&s->pb, 8, (lossless && !ls) ? s->avctx->prediction_method+1 : 0); /* Ss (not used) */
498 switch(s->avctx->codec_id){
499 case CODEC_ID_MJPEG: put_bits(&s->pb, 8, 63); break; /* Se (not used) */
500 case CODEC_ID_LJPEG: put_bits(&s->pb, 8, 0); break; /* not used */
501 case CODEC_ID_JPEGLS: put_bits(&s->pb, 8, 1); break; /* ILV = line interleaved */
505 put_bits(&s->pb, 8, 0); /* Ah/Al (not used) */
507 //FIXME DC/AC entropy table selectors stuff in jpegls
510 static void escape_FF(MpegEncContext *s, int start)
512 int size= put_bits_count(&s->pb) - start*8;
514 uint8_t *buf= s->pb.buf + start;
515 int align= (-(size_t)(buf))&3;
517 assert((size&7) == 0);
521 for(i=0; i<size && i<align; i++){
522 if(buf[i]==0xFF) ff_count++;
524 for(; i<size-15; i+=16){
527 v= *(uint32_t*)(&buf[i]);
528 acc= (((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
529 v= *(uint32_t*)(&buf[i+4]);
530 acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
531 v= *(uint32_t*)(&buf[i+8]);
532 acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
533 v= *(uint32_t*)(&buf[i+12]);
534 acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
542 if(buf[i]==0xFF) ff_count++;
545 if(ff_count==0) return;
548 for(i=0; i<ff_count-3; i+=4)
549 put_bits(&s->pb, 32, 0);
550 put_bits(&s->pb, (ff_count-i)*8, 0);
551 flush_put_bits(&s->pb);
553 for(i=size-1; ff_count; i--){
557 //printf("%d %d\n", i, ff_count);
566 void ff_mjpeg_stuffing(PutBitContext * pbc)
569 length= (-put_bits_count(pbc))&7;
570 if(length) put_bits(pbc, length, (1<<length)-1);
573 void mjpeg_picture_trailer(MpegEncContext *s)
575 ff_mjpeg_stuffing(&s->pb);
576 flush_put_bits(&s->pb);
578 assert((s->header_bits&7)==0);
580 escape_FF(s, s->header_bits>>3);
582 put_marker(&s->pb, EOI);
585 static inline void mjpeg_encode_dc(MpegEncContext *s, int val,
586 uint8_t *huff_size, uint16_t *huff_code)
591 put_bits(&s->pb, huff_size[0], huff_code[0]);
599 nbits= av_log2_16bit(val) + 1;
601 put_bits(&s->pb, huff_size[nbits], huff_code[nbits]);
603 put_bits(&s->pb, nbits, mant & ((1 << nbits) - 1));
607 static void encode_block(MpegEncContext *s, DCTELEM *block, int n)
609 int mant, nbits, code, i, j;
610 int component, dc, run, last_index, val;
611 MJpegContext *m = s->mjpeg_ctx;
612 uint8_t *huff_size_ac;
613 uint16_t *huff_code_ac;
616 component = (n <= 3 ? 0 : n - 4 + 1);
617 dc = block[0]; /* overflow is impossible */
618 val = dc - s->last_dc[component];
620 mjpeg_encode_dc(s, val, m->huff_size_dc_luminance, m->huff_code_dc_luminance);
621 huff_size_ac = m->huff_size_ac_luminance;
622 huff_code_ac = m->huff_code_ac_luminance;
624 mjpeg_encode_dc(s, val, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
625 huff_size_ac = m->huff_size_ac_chrominance;
626 huff_code_ac = m->huff_code_ac_chrominance;
628 s->last_dc[component] = dc;
633 last_index = s->block_last_index[n];
634 for(i=1;i<=last_index;i++) {
635 j = s->intra_scantable.permutated[i];
641 put_bits(&s->pb, huff_size_ac[0xf0], huff_code_ac[0xf0]);
650 nbits= av_log2(val) + 1;
651 code = (run << 4) | nbits;
653 put_bits(&s->pb, huff_size_ac[code], huff_code_ac[code]);
655 put_bits(&s->pb, nbits, mant & ((1 << nbits) - 1));
660 /* output EOB only if not already 64 values */
661 if (last_index < 63 || run != 0)
662 put_bits(&s->pb, huff_size_ac[0], huff_code_ac[0]);
665 void mjpeg_encode_mb(MpegEncContext *s,
666 DCTELEM block[6][64])
670 encode_block(s, block[i], i);
674 static int encode_picture_lossless(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
675 MpegEncContext * const s = avctx->priv_data;
676 MJpegContext * const m = s->mjpeg_ctx;
677 AVFrame *pict = data;
678 const int width= s->width;
679 const int height= s->height;
680 AVFrame * const p= (AVFrame*)&s->current_picture;
681 const int predictor= avctx->prediction_method+1;
683 init_put_bits(&s->pb, buf, buf_size);
686 p->pict_type= FF_I_TYPE;
689 mjpeg_picture_header(s);
691 s->header_bits= put_bits_count(&s->pb);
693 if(avctx->pix_fmt == PIX_FMT_RGBA32){
695 const int linesize= p->linesize[0];
696 uint16_t (*buffer)[4]= (void *) s->rd_scratchpad;
697 int left[3], top[3], topleft[3];
700 buffer[0][i]= 1 << (9 - 1);
703 for(y = 0; y < height; y++) {
704 const int modified_predictor= y ? predictor : 1;
705 uint8_t *ptr = p->data[0] + (linesize * y);
707 if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < width*3*4){
708 av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
713 top[i]= left[i]= topleft[i]= buffer[0][i];
715 for(x = 0; x < width; x++) {
716 buffer[x][1] = ptr[4*x+0] - ptr[4*x+1] + 0x100;
717 buffer[x][2] = ptr[4*x+2] - ptr[4*x+1] + 0x100;
718 buffer[x][0] = (ptr[4*x+0] + 2*ptr[4*x+1] + ptr[4*x+2])>>2;
723 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
726 top[i]= buffer[x+1][i];
728 left[i]= buffer[x][i];
730 diff= ((left[i] - pred + 0x100)&0x1FF) - 0x100;
733 mjpeg_encode_dc(s, diff, m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
735 mjpeg_encode_dc(s, diff, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
741 const int mb_width = (width + s->mjpeg_hsample[0] - 1) / s->mjpeg_hsample[0];
742 const int mb_height = (height + s->mjpeg_vsample[0] - 1) / s->mjpeg_vsample[0];
744 for(mb_y = 0; mb_y < mb_height; mb_y++) {
745 if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < mb_width * 4 * 3 * s->mjpeg_hsample[0] * s->mjpeg_vsample[0]){
746 av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
749 for(mb_x = 0; mb_x < mb_width; mb_x++) {
750 if(mb_x==0 || mb_y==0){
753 int x, y, h, v, linesize;
754 h = s->mjpeg_hsample[i];
755 v = s->mjpeg_vsample[i];
756 linesize= p->linesize[i];
762 ptr = p->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
771 pred= ptr[-linesize];
773 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
778 mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
780 mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
787 int x, y, h, v, linesize;
788 h = s->mjpeg_hsample[i];
789 v = s->mjpeg_vsample[i];
790 linesize= p->linesize[i];
796 ptr = p->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
797 //printf("%d %d %d %d %8X\n", mb_x, mb_y, x, y, ptr);
798 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
801 mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
803 mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
814 mjpeg_picture_trailer(s);
817 flush_put_bits(&s->pb);
818 return pbBufPtr(&s->pb) - s->pb.buf;
819 // return (put_bits_count(&f->pb)+7)/8;
822 #endif //CONFIG_ENCODERS
824 /******************************************/
827 #define MAX_COMPONENTS 4
829 typedef struct MJpegDecodeContext {
830 AVCodecContext *avctx;
832 int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
834 int start_code; /* current start code */
838 int16_t quant_matrixes[4][64];
840 int qscale[4]; ///< quantizer scale calculated from quant_matrixes
842 int org_height; /* size given at codec init */
843 int first_picture; /* true if decoding first picture */
844 int interlaced; /* true if interlaced */
845 int bottom_field; /* true if bottom field */
849 int rct; /* standard rct */
850 int pegasus_rct; /* pegasus reversible colorspace transform */
851 int bits; /* bits per component */
854 int near; ///< near lossless bound (si 0 for lossless)
856 int reset; ///< context halfing intervall ?rename
859 int mb_width, mb_height;
861 int component_id[MAX_COMPONENTS];
862 int h_count[MAX_COMPONENTS]; /* horizontal and vertical count for each component */
863 int v_count[MAX_COMPONENTS];
864 int comp_index[MAX_COMPONENTS];
865 int dc_index[MAX_COMPONENTS];
866 int ac_index[MAX_COMPONENTS];
867 int nb_blocks[MAX_COMPONENTS];
868 int h_scount[MAX_COMPONENTS];
869 int v_scount[MAX_COMPONENTS];
870 int h_max, v_max; /* maximum h and v counts */
871 int quant_index[4]; /* quant table index for each component */
872 int last_dc[MAX_COMPONENTS]; /* last DEQUANTIZED dc (XXX: am I right to do that ?) */
873 AVFrame picture; /* picture structure */
874 int linesize[MAX_COMPONENTS]; ///< linesize << interlaced
875 int8_t *qscale_table;
876 DECLARE_ALIGNED_8(DCTELEM, block[64]);
878 void (*idct_put)(uint8_t *dest/*align 8*/, int line_size, DCTELEM *block/*align 16*/);
880 int restart_interval;
885 int interlace_polarity;
889 int cur_scan; /* current scan, used by JPEG-LS */
890 } MJpegDecodeContext;
892 #include "jpeg_ls.c" //FIXME make jpeg-ls more independant
894 static int mjpeg_decode_dht(MJpegDecodeContext *s);
896 static int build_vlc(VLC *vlc, const uint8_t *bits_table, const uint8_t *val_table,
897 int nb_codes, int use_static)
899 uint8_t huff_size[256];
900 uint16_t huff_code[256];
902 memset(huff_size, 0, sizeof(huff_size));
903 build_huffman_codes(huff_size, huff_code, bits_table, val_table);
905 return init_vlc(vlc, 9, nb_codes, huff_size, 1, 1, huff_code, 2, 2, use_static);
908 static int mjpeg_decode_init(AVCodecContext *avctx)
910 MJpegDecodeContext *s = avctx->priv_data;
912 memset(s, 0, sizeof(MJpegDecodeContext));
916 /* ugly way to get the idct & scantable FIXME */
917 memset(&s2, 0, sizeof(MpegEncContext));
919 // s2->out_format = FMT_MJPEG;
920 dsputil_init(&s2.dsp, avctx);
921 DCT_common_init(&s2);
923 s->scantable= s2.intra_scantable;
924 s->idct_put= s2.dsp.idct_put;
926 s->mpeg_enc_ctx_allocated = 0;
930 s->first_picture = 1;
931 s->org_height = avctx->coded_height;
933 build_vlc(&s->vlcs[0][0], bits_dc_luminance, val_dc_luminance, 12, 0);
934 build_vlc(&s->vlcs[0][1], bits_dc_chrominance, val_dc_chrominance, 12, 0);
935 build_vlc(&s->vlcs[1][0], bits_ac_luminance, val_ac_luminance, 251, 0);
936 build_vlc(&s->vlcs[1][1], bits_ac_chrominance, val_ac_chrominance, 251, 0);
938 if (avctx->flags & CODEC_FLAG_EXTERN_HUFF)
940 av_log(avctx, AV_LOG_INFO, "mjpeg: using external huffman table\n");
941 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size*8);
943 /* should check for error - but dunno */
951 * finds the end of the current frame in the bitstream.
952 * @return the position of the first byte of the next frame, or -1
954 static int find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size){
958 vop_found= pc->frame_start_found;
963 for(i=0; i<buf_size; i++){
964 state= (state<<8) | buf[i];
974 /* EOF considered as end of frame */
977 for(; i<buf_size; i++){
978 state= (state<<8) | buf[i];
980 pc->frame_start_found=0;
986 pc->frame_start_found= vop_found;
988 return END_NOT_FOUND;
991 static int jpeg_parse(AVCodecParserContext *s,
992 AVCodecContext *avctx,
993 uint8_t **poutbuf, int *poutbuf_size,
994 const uint8_t *buf, int buf_size)
996 ParseContext *pc = s->priv_data;
999 next= find_frame_end(pc, buf, buf_size);
1001 if (ff_combine_frame(pc, next, (uint8_t **)&buf, &buf_size) < 0) {
1007 *poutbuf = (uint8_t *)buf;
1008 *poutbuf_size = buf_size;
1012 /* quantize tables */
1013 static int mjpeg_decode_dqt(MJpegDecodeContext *s)
1015 int len, index, i, j;
1017 len = get_bits(&s->gb, 16) - 2;
1020 /* only 8 bit precision handled */
1021 if (get_bits(&s->gb, 4) != 0)
1023 dprintf("dqt: 16bit precision\n");
1026 index = get_bits(&s->gb, 4);
1029 dprintf("index=%d\n", index);
1030 /* read quant table */
1032 j = s->scantable.permutated[i];
1033 s->quant_matrixes[index][j] = get_bits(&s->gb, 8);
1036 //XXX FIXME finetune, and perhaps add dc too
1037 s->qscale[index]= FFMAX(
1038 s->quant_matrixes[index][s->scantable.permutated[1]],
1039 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
1040 dprintf("qscale[%d]: %d\n", index, s->qscale[index]);
1047 /* decode huffman tables and build VLC decoders */
1048 static int mjpeg_decode_dht(MJpegDecodeContext *s)
1050 int len, index, i, class, n, v, code_max;
1051 uint8_t bits_table[17];
1052 uint8_t val_table[256];
1054 len = get_bits(&s->gb, 16) - 2;
1059 class = get_bits(&s->gb, 4);
1062 index = get_bits(&s->gb, 4);
1066 for(i=1;i<=16;i++) {
1067 bits_table[i] = get_bits(&s->gb, 8);
1071 if (len < n || n > 256)
1076 v = get_bits(&s->gb, 8);
1083 /* build VLC and flush previous vlc if present */
1084 free_vlc(&s->vlcs[class][index]);
1085 dprintf("class=%d index=%d nb_codes=%d\n",
1086 class, index, code_max + 1);
1087 if(build_vlc(&s->vlcs[class][index], bits_table, val_table, code_max + 1, 0) < 0){
1094 static int mjpeg_decode_sof(MJpegDecodeContext *s)
1096 int len, nb_components, i, width, height;
1098 /* XXX: verify len field validity */
1099 len = get_bits(&s->gb, 16);
1100 s->bits= get_bits(&s->gb, 8);
1102 if(s->pegasus_rct) s->bits=9;
1103 if(s->bits==9 && !s->pegasus_rct) s->rct=1; //FIXME ugly
1105 if (s->bits != 8 && !s->lossless){
1106 av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");
1109 if (s->bits > 8 && s->ls){
1110 av_log(s->avctx, AV_LOG_ERROR, "only <= 8 bits/component accepted for JPEG-LS\n");
1114 height = get_bits(&s->gb, 16);
1115 width = get_bits(&s->gb, 16);
1117 dprintf("sof0: picture: %dx%d\n", width, height);
1118 if(avcodec_check_dimensions(s->avctx, width, height))
1121 nb_components = get_bits(&s->gb, 8);
1122 if (nb_components <= 0 ||
1123 nb_components > MAX_COMPONENTS)
1125 s->nb_components = nb_components;
1128 for(i=0;i<nb_components;i++) {
1130 s->component_id[i] = get_bits(&s->gb, 8) - 1;
1131 s->h_count[i] = get_bits(&s->gb, 4);
1132 s->v_count[i] = get_bits(&s->gb, 4);
1133 /* compute hmax and vmax (only used in interleaved case) */
1134 if (s->h_count[i] > s->h_max)
1135 s->h_max = s->h_count[i];
1136 if (s->v_count[i] > s->v_max)
1137 s->v_max = s->v_count[i];
1138 s->quant_index[i] = get_bits(&s->gb, 8);
1139 if (s->quant_index[i] >= 4)
1141 dprintf("component %d %d:%d id: %d quant:%d\n", i, s->h_count[i],
1142 s->v_count[i], s->component_id[i], s->quant_index[i]);
1145 if(s->ls && (s->h_max > 1 || s->v_max > 1)) {
1146 av_log(s->avctx, AV_LOG_ERROR, "Subsampling in JPEG-LS is not supported.\n");
1150 if(s->v_max==1 && s->h_max==1 && s->lossless==1) s->rgb=1;
1152 /* if different size, realloc/alloc picture */
1153 /* XXX: also check h_count and v_count */
1154 if (width != s->width || height != s->height) {
1155 av_freep(&s->qscale_table);
1160 /* test interlaced mode */
1161 if (s->first_picture &&
1162 s->org_height != 0 &&
1163 s->height < ((s->org_height * 3) / 4)) {
1165 // s->bottom_field = (s->interlace_polarity) ? 1 : 0;
1166 s->bottom_field = 0;
1170 avcodec_set_dimensions(s->avctx, width, height);
1172 s->qscale_table= av_mallocz((s->width+15)/16);
1174 s->first_picture = 0;
1177 if(s->interlaced && s->bottom_field)
1180 /* XXX: not complete test ! */
1181 switch((s->h_count[0] << 4) | s->v_count[0]) {
1184 s->avctx->pix_fmt = PIX_FMT_RGBA32;
1185 }else if(s->nb_components==3)
1186 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV444P : PIX_FMT_YUVJ444P;
1188 s->avctx->pix_fmt = PIX_FMT_GRAY8;
1191 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV422P : PIX_FMT_YUVJ422P;
1195 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420P;
1199 if(s->nb_components > 1)
1200 s->avctx->pix_fmt = PIX_FMT_RGB24;
1202 s->avctx->pix_fmt = PIX_FMT_GRAY8;
1205 if(s->picture.data[0])
1206 s->avctx->release_buffer(s->avctx, &s->picture);
1208 s->picture.reference= 0;
1209 if(s->avctx->get_buffer(s->avctx, &s->picture) < 0){
1210 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
1213 s->picture.pict_type= I_TYPE;
1214 s->picture.key_frame= 1;
1217 s->linesize[i]= s->picture.linesize[i] << s->interlaced;
1220 // printf("%d %d %d %d %d %d\n", s->width, s->height, s->linesize[0], s->linesize[1], s->interlaced, s->avctx->height);
1222 if (len != (8+(3*nb_components)))
1224 dprintf("decode_sof0: error, len(%d) mismatch\n", len);
1230 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
1233 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
1236 dprintf("mjpeg_decode_dc: bad vlc: %d:%d (%p)\n", 0, dc_index,
1237 &s->vlcs[0][dc_index]);
1242 return get_xbits(&s->gb, code);
1247 /* decode block and dequantize */
1248 static int decode_block(MJpegDecodeContext *s, DCTELEM *block,
1249 int component, int dc_index, int ac_index, int quant_index)
1251 int code, i, j, level, val;
1253 int16_t *quant_matrix;
1256 val = mjpeg_decode_dc(s, dc_index);
1257 if (val == 0xffff) {
1258 dprintf("error dc\n");
1261 quant_matrix = s->quant_matrixes[quant_index];
1262 val = val * quant_matrix[0] + s->last_dc[component];
1263 s->last_dc[component] = val;
1266 ac_vlc = &s->vlcs[1][ac_index];
1269 code = get_vlc2(&s->gb, s->vlcs[1][ac_index].table, 9, 2);
1272 dprintf("error ac\n");
1281 level = get_xbits(&s->gb, code & 0xf);
1284 dprintf("error count: %d\n", i);
1287 j = s->scantable.permutated[i];
1288 block[j] = level * quant_matrix[j];
1297 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor, int point_transform){
1299 uint16_t buffer[32768][4];
1300 int left[3], top[3], topleft[3];
1301 const int linesize= s->linesize[0];
1302 const int mask= (1<<s->bits)-1;
1304 if((unsigned)s->mb_width > 32768) //dynamic alloc
1308 buffer[0][i]= 1 << (s->bits + point_transform - 1);
1310 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
1311 const int modified_predictor= mb_y ? predictor : 1;
1312 uint8_t *ptr = s->picture.data[0] + (linesize * mb_y);
1314 if (s->interlaced && s->bottom_field)
1315 ptr += linesize >> 1;
1318 top[i]= left[i]= topleft[i]= buffer[0][i];
1320 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1321 if (s->restart_interval && !s->restart_count)
1322 s->restart_count = s->restart_interval;
1328 top[i]= buffer[mb_x][i];
1330 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
1333 buffer[mb_x][i]= mask & (pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform));
1336 if (s->restart_interval && !--s->restart_count) {
1337 align_get_bits(&s->gb);
1338 skip_bits(&s->gb, 16); /* skip RSTn */
1343 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1344 ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200)>>2);
1345 ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
1346 ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
1348 }else if(s->pegasus_rct){
1349 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1350 ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2])>>2);
1351 ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
1352 ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
1355 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1356 ptr[4*mb_x+0] = buffer[mb_x][0];
1357 ptr[4*mb_x+1] = buffer[mb_x][1];
1358 ptr[4*mb_x+2] = buffer[mb_x][2];
1365 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor, int point_transform){
1367 const int nb_components=3;
1369 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
1370 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1371 if (s->restart_interval && !s->restart_count)
1372 s->restart_count = s->restart_interval;
1374 if(mb_x==0 || mb_y==0 || s->interlaced){
1375 for(i=0;i<nb_components;i++) {
1377 int n, h, v, x, y, c, j, linesize;
1378 n = s->nb_blocks[i];
1379 c = s->comp_index[i];
1384 linesize= s->linesize[c];
1386 for(j=0; j<n; j++) {
1389 ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
1390 if(y==0 && mb_y==0){
1391 if(x==0 && mb_x==0){
1392 pred= 128 << point_transform;
1397 if(x==0 && mb_x==0){
1398 pred= ptr[-linesize];
1400 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1404 if (s->interlaced && s->bottom_field)
1405 ptr += linesize >> 1;
1406 *ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
1415 for(i=0;i<nb_components;i++) {
1417 int n, h, v, x, y, c, j, linesize;
1418 n = s->nb_blocks[i];
1419 c = s->comp_index[i];
1424 linesize= s->linesize[c];
1426 for(j=0; j<n; j++) {
1429 ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
1430 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1431 *ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
1439 if (s->restart_interval && !--s->restart_count) {
1440 align_get_bits(&s->gb);
1441 skip_bits(&s->gb, 16); /* skip RSTn */
1448 static int mjpeg_decode_scan(MJpegDecodeContext *s){
1450 const int nb_components=3;
1452 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
1453 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1454 if (s->restart_interval && !s->restart_count)
1455 s->restart_count = s->restart_interval;
1457 for(i=0;i<nb_components;i++) {
1459 int n, h, v, x, y, c, j;
1460 n = s->nb_blocks[i];
1461 c = s->comp_index[i];
1467 memset(s->block, 0, sizeof(s->block));
1468 if (decode_block(s, s->block, i,
1469 s->dc_index[i], s->ac_index[i],
1470 s->quant_index[c]) < 0) {
1471 dprintf("error y=%d x=%d\n", mb_y, mb_x);
1474 // dprintf("mb: %d %d processed\n", mb_y, mb_x);
1475 ptr = s->picture.data[c] +
1476 (((s->linesize[c] * (v * mb_y + y) * 8) +
1477 (h * mb_x + x) * 8) >> s->avctx->lowres);
1478 if (s->interlaced && s->bottom_field)
1479 ptr += s->linesize[c] >> 1;
1480 //av_log(NULL, AV_LOG_DEBUG, "%d %d %d %d %d %d %d %d \n", mb_x, mb_y, x, y, c, s->bottom_field, (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1481 s->idct_put(ptr, s->linesize[c], s->block);
1488 /* (< 1350) buggy workaround for Spectralfan.mov, should be fixed */
1489 if (s->restart_interval && (s->restart_interval < 1350) &&
1490 !--s->restart_count) {
1491 align_get_bits(&s->gb);
1492 skip_bits(&s->gb, 16); /* skip RSTn */
1493 for (i=0; i<nb_components; i++) /* reset dc */
1494 s->last_dc[i] = 1024;
1501 static int mjpeg_decode_sos(MJpegDecodeContext *s)
1503 int len, nb_components, i, h, v, predictor, point_transform;
1504 int vmax, hmax, index, id;
1505 const int block_size= s->lossless ? 1 : 8;
1508 /* XXX: verify len field validity */
1509 len = get_bits(&s->gb, 16);
1510 nb_components = get_bits(&s->gb, 8);
1511 if (len != 6+2*nb_components)
1513 dprintf("decode_sos: invalid len (%d)\n", len);
1516 /* XXX: only interleaved scan accepted */
1517 if ((nb_components != s->nb_components) && !s->ls)
1519 dprintf("decode_sos: components(%d) mismatch\n", nb_components);
1524 for(i=0;i<nb_components;i++) {
1525 id = get_bits(&s->gb, 8) - 1;
1526 dprintf("component: %d\n", id);
1527 /* find component index */
1528 for(index=0;index<s->nb_components;index++)
1529 if (id == s->component_id[index])
1531 if (index == s->nb_components)
1533 dprintf("decode_sos: index(%d) out of components\n", index);
1537 s->comp_index[i] = index;
1539 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1540 s->h_scount[i] = s->h_count[index];
1541 s->v_scount[i] = s->v_count[index];
1543 s->dc_index[i] = get_bits(&s->gb, 4);
1544 s->ac_index[i] = get_bits(&s->gb, 4);
1546 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1547 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1550 switch(s->start_code)
1553 if (dc_index[i] > 1 || ac_index[i] > 1)
1558 if (dc_index[i] > 3 || ac_index[i] > 3)
1562 if (dc_index[i] > 3 || ac_index[i] != 0)
1569 predictor= get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1570 ilv= get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1571 skip_bits(&s->gb, 4); /* Ah */
1572 point_transform= get_bits(&s->gb, 4); /* Al */
1574 for(i=0;i<nb_components;i++)
1575 s->last_dc[i] = 1024;
1577 if (nb_components > 1) {
1578 /* interleaved stream */
1579 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1580 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1581 } else if(!s->ls) { /* skip this for JPEG-LS */
1582 h = s->h_max / s->h_scount[s->comp_index[0]];
1583 v = s->v_max / s->v_scount[s->comp_index[0]];
1584 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1585 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1586 s->nb_blocks[0] = 1;
1591 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1592 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d %s\n", s->lossless ? "lossless" : "sequencial DCT", s->rgb ? "RGB" : "",
1593 predictor, point_transform, ilv, s->bits,
1594 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""));
1597 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1598 for (i = s->mjpb_skiptosod; i > 0; i--)
1599 skip_bits(&s->gb, 8);
1604 // reset_ls_coding_parameters(s, 0);
1606 ls_decode_picture(s, predictor, point_transform, ilv);
1609 if(ljpeg_decode_rgb_scan(s, predictor, point_transform) < 0)
1612 if(ljpeg_decode_yuv_scan(s, predictor, point_transform) < 0)
1617 if(mjpeg_decode_scan(s) < 0)
1623 dprintf("decode_sos: ac/dc index out of range\n");
1627 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1629 if (get_bits(&s->gb, 16) != 4)
1631 s->restart_interval = get_bits(&s->gb, 16);
1632 s->restart_count = 0;
1633 dprintf("restart interval: %d\n", s->restart_interval);
1638 static int mjpeg_decode_app(MJpegDecodeContext *s)
1642 len = get_bits(&s->gb, 16);
1645 if(8*len + get_bits_count(&s->gb) > s->gb.size_in_bits)
1648 id = (get_bits(&s->gb, 16) << 16) | get_bits(&s->gb, 16);
1652 if(s->avctx->debug & FF_DEBUG_STARTCODE){
1653 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
1656 /* buggy AVID, it puts EOI only at every 10th frame */
1657 /* also this fourcc is used by non-avid files too, it holds some
1658 informations, but it's always present in AVID creates files */
1659 if (id == ff_get_fourcc("AVI1"))
1666 4bytes field_size_less_padding
1669 // if (s->first_picture)
1670 // printf("mjpeg: workarounding buggy AVID\n");
1671 s->interlace_polarity = get_bits(&s->gb, 8);
1673 skip_bits(&s->gb, 8);
1674 skip_bits(&s->gb, 32);
1675 skip_bits(&s->gb, 32);
1678 // if (s->interlace_polarity)
1679 // printf("mjpeg: interlace polarity: %d\n", s->interlace_polarity);
1685 if (id == ff_get_fourcc("JFIF"))
1687 int t_w, t_h, v1, v2;
1688 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1689 v1= get_bits(&s->gb, 8);
1690 v2= get_bits(&s->gb, 8);
1691 skip_bits(&s->gb, 8);
1693 s->avctx->sample_aspect_ratio.num= get_bits(&s->gb, 16);
1694 s->avctx->sample_aspect_ratio.den= get_bits(&s->gb, 16);
1696 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1697 av_log(s->avctx, AV_LOG_INFO, "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1699 s->avctx->sample_aspect_ratio.num,
1700 s->avctx->sample_aspect_ratio.den
1703 t_w = get_bits(&s->gb, 8);
1704 t_h = get_bits(&s->gb, 8);
1707 /* skip thumbnail */
1708 if (len-10-(t_w*t_h*3) > 0)
1715 if (id == ff_get_fourcc("Adob") && (get_bits(&s->gb, 8) == 'e'))
1717 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1718 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1719 skip_bits(&s->gb, 16); /* version */
1720 skip_bits(&s->gb, 16); /* flags0 */
1721 skip_bits(&s->gb, 16); /* flags1 */
1722 skip_bits(&s->gb, 8); /* transform */
1727 if (id == ff_get_fourcc("LJIF")){
1728 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1729 av_log(s->avctx, AV_LOG_INFO, "Pegasus lossless jpeg header found\n");
1730 skip_bits(&s->gb, 16); /* version ? */
1731 skip_bits(&s->gb, 16); /* unknwon always 0? */
1732 skip_bits(&s->gb, 16); /* unknwon always 0? */
1733 skip_bits(&s->gb, 16); /* unknwon always 0? */
1734 switch( get_bits(&s->gb, 8)){
1744 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
1751 if ((s->start_code == APP1) && (len > (0x28 - 8)))
1753 id = (get_bits(&s->gb, 16) << 16) | get_bits(&s->gb, 16);
1756 if (id == ff_get_fourcc("mjpg")) /* Apple MJPEG-A */
1759 skip_bits(&s->gb, 32); /* field size */
1760 skip_bits(&s->gb, 32); /* pad field size */
1761 skip_bits(&s->gb, 32); /* next off */
1762 skip_bits(&s->gb, 32); /* quant off */
1763 skip_bits(&s->gb, 32); /* huff off */
1764 skip_bits(&s->gb, 32); /* image off */
1765 skip_bits(&s->gb, 32); /* scan off */
1766 skip_bits(&s->gb, 32); /* data off */
1768 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1769 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1774 /* slow but needed for extreme adobe jpegs */
1776 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error, decode_app parser read over the end\n");
1778 skip_bits(&s->gb, 8);
1783 static int mjpeg_decode_com(MJpegDecodeContext *s)
1785 int len = get_bits(&s->gb, 16);
1786 if (len >= 2 && 8*len - 16 + get_bits_count(&s->gb) <= s->gb.size_in_bits) {
1787 uint8_t *cbuf = av_malloc(len - 1);
1790 for (i = 0; i < len - 2; i++)
1791 cbuf[i] = get_bits(&s->gb, 8);
1792 if (i > 0 && cbuf[i-1] == '\n')
1797 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1798 av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);
1800 /* buggy avid, it puts EOI only at every 10th frame */
1801 if (!strcmp(cbuf, "AVID"))
1804 // if (s->first_picture)
1805 // printf("mjpeg: workarounding buggy AVID\n");
1807 else if(!strcmp(cbuf, "CS=ITU601")){
1819 static int valid_marker_list[] =
1821 /* 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f */
1822 /* 0 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1823 /* 1 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1824 /* 2 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1825 /* 3 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1826 /* 4 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1827 /* 5 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1828 /* 6 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1829 /* 7 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1830 /* 8 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1831 /* 9 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1832 /* a */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1833 /* b */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1834 /* c */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1835 /* d */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1836 /* e */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1837 /* f */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0,
1841 /* return the 8 bit start code value and update the search
1842 state. Return -1 if no start code found */
1843 static int find_marker(uint8_t **pbuf_ptr, uint8_t *buf_end)
1852 buf_ptr = *pbuf_ptr;
1853 while (buf_ptr < buf_end) {
1856 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1867 dprintf("find_marker skipped %d bytes\n", skipped);
1869 *pbuf_ptr = buf_ptr;
1873 static int mjpeg_decode_frame(AVCodecContext *avctx,
1874 void *data, int *data_size,
1875 uint8_t *buf, int buf_size)
1877 MJpegDecodeContext *s = avctx->priv_data;
1878 uint8_t *buf_end, *buf_ptr;
1880 AVFrame *picture = data;
1883 buf_end = buf + buf_size;
1884 while (buf_ptr < buf_end) {
1885 /* find start next marker */
1886 start_code = find_marker(&buf_ptr, buf_end);
1889 if (start_code < 0) {
1892 dprintf("marker=%x avail_size_in_buf=%d\n", start_code, buf_end - buf_ptr);
1894 if ((buf_end - buf_ptr) > s->buffer_size)
1897 s->buffer_size = buf_end-buf_ptr;
1898 s->buffer = av_malloc(s->buffer_size + FF_INPUT_BUFFER_PADDING_SIZE);
1899 dprintf("buffer too small, expanding to %d bytes\n",
1903 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1904 if (start_code == SOS && !s->ls)
1906 uint8_t *src = buf_ptr;
1907 uint8_t *dst = s->buffer;
1911 uint8_t x = *(src++);
1916 while(src<buf_end && x == 0xff)
1919 if (x >= 0xd0 && x <= 0xd7)
1925 init_get_bits(&s->gb, s->buffer, (dst - s->buffer)*8);
1927 dprintf("escaping removed %d bytes\n",
1928 (buf_end - buf_ptr) - (dst - s->buffer));
1930 else if(start_code == SOS && s->ls){
1931 uint8_t *src = buf_ptr;
1932 uint8_t *dst = s->buffer;
1940 while (src + t < buf_end){
1941 uint8_t x = src[t++];
1943 while((src + t < buf_end) && x == 0xff)
1953 init_put_bits(&pb, dst, t);
1955 /* unescape bitstream */
1957 uint8_t x = src[b++];
1958 put_bits(&pb, 8, x);
1961 put_bits(&pb, 7, x);
1965 flush_put_bits(&pb);
1967 init_get_bits(&s->gb, dst, bit_count);
1970 init_get_bits(&s->gb, buf_ptr, (buf_end - buf_ptr)*8);
1972 s->start_code = start_code;
1973 if(s->avctx->debug & FF_DEBUG_STARTCODE){
1974 av_log(s->avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1977 /* process markers */
1978 if (start_code >= 0xd0 && start_code <= 0xd7) {
1979 dprintf("restart marker: %d\n", start_code&0x0f);
1981 } else if (start_code >= APP0 && start_code <= APP15) {
1982 mjpeg_decode_app(s);
1984 } else if (start_code == COM){
1985 mjpeg_decode_com(s);
1988 switch(start_code) {
1990 s->restart_interval = 0;
1992 s->restart_count = 0;
1993 /* nothing to do on SOI */
1996 mjpeg_decode_dqt(s);
1999 if(mjpeg_decode_dht(s) < 0){
2000 av_log(s->avctx, AV_LOG_ERROR, "huffman table decode error\n");
2006 if (mjpeg_decode_sof(s) < 0)
2011 if (mjpeg_decode_sof(s) < 0)
2017 if (mjpeg_decode_sof(s) < 0)
2021 if (decode_lse(s) < 0)
2025 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
2029 if (s->interlaced) {
2030 s->bottom_field ^= 1;
2031 /* if not bottom field, do not output image yet */
2032 if (s->bottom_field)
2035 *picture = s->picture;
2036 *data_size = sizeof(AVFrame);
2039 picture->quality= FFMAX(FFMAX(s->qscale[0], s->qscale[1]), s->qscale[2]);
2040 picture->qstride= 0;
2041 picture->qscale_table= s->qscale_table;
2042 memset(picture->qscale_table, picture->quality, (s->width+15)/16);
2043 if(avctx->debug & FF_DEBUG_QP)
2044 av_log(s->avctx, AV_LOG_DEBUG, "QP: %d\n", picture->quality);
2045 picture->quality*= FF_QP2LAMBDA;
2052 mjpeg_decode_sos(s);
2053 /* buggy avid puts EOI every 10-20th frame */
2054 /* if restart period is over process EOI */
2055 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
2059 mjpeg_decode_dri(s);
2073 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: unsupported coding type (%x)\n", start_code);
2076 // printf("mjpeg: unsupported marker (%x)\n", start_code);
2081 /* eof process start code */
2082 buf_ptr += (get_bits_count(&s->gb)+7)/8;
2083 dprintf("marker parser used %d bytes (%d bits)\n",
2084 (get_bits_count(&s->gb)+7)/8, get_bits_count(&s->gb));
2089 dprintf("mjpeg decode frame unused %d bytes\n", buf_end - buf_ptr);
2090 // return buf_end - buf_ptr;
2091 return buf_ptr - buf;
2094 static int mjpegb_decode_frame(AVCodecContext *avctx,
2095 void *data, int *data_size,
2096 uint8_t *buf, int buf_size)
2098 MJpegDecodeContext *s = avctx->priv_data;
2099 uint8_t *buf_end, *buf_ptr;
2100 AVFrame *picture = data;
2101 GetBitContext hgb; /* for the header */
2102 uint32_t dqt_offs, dht_offs, sof_offs, sos_offs, second_field_offs;
2103 uint32_t field_size, sod_offs;
2106 buf_end = buf + buf_size;
2109 /* reset on every SOI */
2110 s->restart_interval = 0;
2111 s->restart_count = 0;
2112 s->mjpb_skiptosod = 0;
2114 init_get_bits(&hgb, buf_ptr, /*buf_size*/(buf_end - buf_ptr)*8);
2116 skip_bits(&hgb, 32); /* reserved zeros */
2118 if (get_bits_long(&hgb, 32) != be2me_32(ff_get_fourcc("mjpg")))
2120 dprintf("not mjpeg-b (bad fourcc)\n");
2124 field_size = get_bits_long(&hgb, 32); /* field size */
2125 dprintf("field size: 0x%x\n", field_size);
2126 skip_bits(&hgb, 32); /* padded field size */
2127 second_field_offs = get_bits_long(&hgb, 32);
2128 dprintf("second field offs: 0x%x\n", second_field_offs);
2129 if (second_field_offs)
2132 dqt_offs = get_bits_long(&hgb, 32);
2133 dprintf("dqt offs: 0x%x\n", dqt_offs);
2136 init_get_bits(&s->gb, buf+dqt_offs, (buf_end - (buf+dqt_offs))*8);
2137 s->start_code = DQT;
2138 mjpeg_decode_dqt(s);
2141 dht_offs = get_bits_long(&hgb, 32);
2142 dprintf("dht offs: 0x%x\n", dht_offs);
2145 init_get_bits(&s->gb, buf+dht_offs, (buf_end - (buf+dht_offs))*8);
2146 s->start_code = DHT;
2147 mjpeg_decode_dht(s);
2150 sof_offs = get_bits_long(&hgb, 32);
2151 dprintf("sof offs: 0x%x\n", sof_offs);
2154 init_get_bits(&s->gb, buf+sof_offs, (buf_end - (buf+sof_offs))*8);
2155 s->start_code = SOF0;
2156 if (mjpeg_decode_sof(s) < 0)
2160 sos_offs = get_bits_long(&hgb, 32);
2161 dprintf("sos offs: 0x%x\n", sos_offs);
2162 sod_offs = get_bits_long(&hgb, 32);
2163 dprintf("sod offs: 0x%x\n", sod_offs);
2166 // init_get_bits(&s->gb, buf+sos_offs, (buf_end - (buf+sos_offs))*8);
2167 init_get_bits(&s->gb, buf+sos_offs, field_size*8);
2168 s->mjpb_skiptosod = (sod_offs - sos_offs - show_bits(&s->gb, 16));
2169 s->start_code = SOS;
2170 mjpeg_decode_sos(s);
2173 if (s->interlaced) {
2174 s->bottom_field ^= 1;
2175 /* if not bottom field, do not output image yet */
2176 if (s->bottom_field && second_field_offs)
2178 buf_ptr = buf + second_field_offs;
2179 second_field_offs = 0;
2184 //XXX FIXME factorize, this looks very similar to the EOI code
2186 *picture= s->picture;
2187 *data_size = sizeof(AVFrame);
2190 picture->quality= FFMAX(FFMAX(s->qscale[0], s->qscale[1]), s->qscale[2]);
2191 picture->qstride= 0;
2192 picture->qscale_table= s->qscale_table;
2193 memset(picture->qscale_table, picture->quality, (s->width+15)/16);
2194 if(avctx->debug & FF_DEBUG_QP)
2195 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", picture->quality);
2196 picture->quality*= FF_QP2LAMBDA;
2199 return buf_ptr - buf;
2204 static int sp5x_decode_frame(AVCodecContext *avctx,
2205 void *data, int *data_size,
2206 uint8_t *buf, int buf_size)
2209 MJpegDecodeContext *s = avctx->priv_data;
2211 const int qscale = 5;
2212 uint8_t *buf_ptr, *buf_end, *recoded;
2215 if (!avctx->width || !avctx->height)
2219 buf_end = buf + buf_size;
2222 recoded = av_mallocz(buf_size + 1024);
2227 recoded[j++] = 0xFF;
2228 recoded[j++] = 0xD8;
2230 memcpy(recoded+j, &sp5x_data_dqt[0], sizeof(sp5x_data_dqt));
2231 memcpy(recoded+j+5, &sp5x_quant_table[qscale * 2], 64);
2232 memcpy(recoded+j+70, &sp5x_quant_table[(qscale * 2) + 1], 64);
2233 j += sizeof(sp5x_data_dqt);
2235 memcpy(recoded+j, &sp5x_data_dht[0], sizeof(sp5x_data_dht));
2236 j += sizeof(sp5x_data_dht);
2238 memcpy(recoded+j, &sp5x_data_sof[0], sizeof(sp5x_data_sof));
2239 recoded[j+5] = (avctx->coded_height >> 8) & 0xFF;
2240 recoded[j+6] = avctx->coded_height & 0xFF;
2241 recoded[j+7] = (avctx->coded_width >> 8) & 0xFF;
2242 recoded[j+8] = avctx->coded_width & 0xFF;
2243 j += sizeof(sp5x_data_sof);
2245 memcpy(recoded+j, &sp5x_data_sos[0], sizeof(sp5x_data_sos));
2246 j += sizeof(sp5x_data_sos);
2248 for (i = 14; i < buf_size && j < buf_size+1024-2; i++)
2250 recoded[j++] = buf[i];
2256 recoded[j++] = 0xFF;
2257 recoded[j++] = 0xD9;
2259 i = mjpeg_decode_frame(avctx, data, data_size, recoded, j);
2266 s->width = avctx->coded_width;
2267 s->height = avctx->coded_height;
2268 s->nb_components = 3;
2269 s->component_id[0] = 0;
2272 s->quant_index[0] = 0;
2273 s->component_id[1] = 1;
2276 s->quant_index[1] = 1;
2277 s->component_id[2] = 2;
2280 s->quant_index[2] = 1;
2284 s->qscale_table = av_mallocz((s->width+15)/16);
2285 avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420;
2288 s->picture.reference = 0;
2289 if (avctx->get_buffer(avctx, &s->picture) < 0)
2291 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
2295 s->picture.pict_type = I_TYPE;
2296 s->picture.key_frame = 1;
2298 for (i = 0; i < 3; i++)
2299 s->linesize[i] = s->picture.linesize[i] << s->interlaced;
2302 for (i = 0; i < 64; i++)
2304 j = s->scantable.permutated[i];
2305 s->quant_matrixes[0][j] = sp5x_quant_table[(qscale * 2) + i];
2307 s->qscale[0] = FFMAX(
2308 s->quant_matrixes[0][s->scantable.permutated[1]],
2309 s->quant_matrixes[0][s->scantable.permutated[8]]) >> 1;
2311 for (i = 0; i < 64; i++)
2313 j = s->scantable.permutated[i];
2314 s->quant_matrixes[1][j] = sp5x_quant_table[(qscale * 2) + 1 + i];
2316 s->qscale[1] = FFMAX(
2317 s->quant_matrixes[1][s->scantable.permutated[1]],
2318 s->quant_matrixes[1][s->scantable.permutated[8]]) >> 1;
2323 s->comp_index[0] = 0;
2324 s->nb_blocks[0] = s->h_count[0] * s->v_count[0];
2325 s->h_scount[0] = s->h_count[0];
2326 s->v_scount[0] = s->v_count[0];
2330 s->comp_index[1] = 1;
2331 s->nb_blocks[1] = s->h_count[1] * s->v_count[1];
2332 s->h_scount[1] = s->h_count[1];
2333 s->v_scount[1] = s->v_count[1];
2337 s->comp_index[2] = 2;
2338 s->nb_blocks[2] = s->h_count[2] * s->v_count[2];
2339 s->h_scount[2] = s->h_count[2];
2340 s->v_scount[2] = s->v_count[2];
2344 for (i = 0; i < 3; i++)
2345 s->last_dc[i] = 1024;
2347 s->mb_width = (s->width * s->h_max * 8 -1) / (s->h_max * 8);
2348 s->mb_height = (s->height * s->v_max * 8 -1) / (s->v_max * 8);
2350 init_get_bits(&s->gb, buf+14, (buf_size-14)*8);
2352 return mjpeg_decode_scan(s);
2358 static int mjpeg_decode_end(AVCodecContext *avctx)
2360 MJpegDecodeContext *s = avctx->priv_data;
2364 av_free(s->qscale_table);
2368 free_vlc(&s->vlcs[i][j]);
2373 AVCodec mjpeg_decoder = {
2377 sizeof(MJpegDecodeContext),
2386 AVCodec mjpegb_decoder = {
2390 sizeof(MJpegDecodeContext),
2394 mjpegb_decode_frame,
2399 AVCodec sp5x_decoder = {
2403 sizeof(MJpegDecodeContext),
2412 #ifdef CONFIG_ENCODERS
2413 AVCodec ljpeg_encoder = { //FIXME avoid MPV_* lossless jpeg shouldnt need them
2417 sizeof(MpegEncContext),
2419 encode_picture_lossless,
2424 AVCodecParser mjpeg_parser = {
2426 sizeof(ParseContext),